1) A combination of different metals. a) alloy b) steel c) non ferrous 2) A type of plastic used for insulation. a) rubber b) PVC c) composite 3) An alloy formed by mixing iron and carbon. a) brass b) steel c) copper 4) An alloy formed by mixing copper and zinc. a) iron b) steel c) brass 5) Metals containing iron a) ferrous b) non ferrous 6) A composite material used to build houses. a) iron b) concrete c) wood 7) A good insulator but brittle. a) PVC b) ceramic 8) Commonly used metal. It is used in wires and cables. a) copper b) zinc 9) The most ductile metal, used to create jewelry. a) bronze b) gold 10) Iron is... a) malleable b) pasty and soft c) ductile 11) Alloys are created to a) invent new materials b) improve some properties 12) Different materials are used to build tools and machinery. a) true b) false 13) The most used materials in mechanical engineering are... a) ferrous and non ferrous b) metals, polymer, ceramic, and composite.  c) metals, polymer, composite.

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